مسائل المنتخبه (Articles Of Islamic Acts) - الخوئي، السيد أبوالقاسم - الصفحة ١٠٣ - KINDS OF HAIZ

if her blood comes on all the days of her habit as well as a few days earlier than her habit with signs of menses and thetotal number of the days does not exceed ١٠ all of it is menses. And if it exceeds ١٠ days it is menses only for the days of her habit and the blood which has come earlierthan that is istihaza. And m case she has not offered her prayers during those days she should offer the lapsed prayers and if blood is discharged from her body on all daysof her habit as well as on a few days after her habit and the total number of days does not exceed ١٠ all of it is menses and if it exceeds ١٠ only the blood which comes onthe days of her habit is menses and the rest is istihaza.
٤٨٨. If a woman has the habit of time and number and her blood is discharged on some days of her habit and on a few days earlier than that with the signs of mensesand the total number of days does not exceed ١٠ all of it is menses. And if the number of days exceeds ١٠ and if the days on which her blood has been discharged according toher habit is less than ٨ and by adding to it a few days earlier than that the number of days equals her habit she should treat the blood discharged during those days to bemenses and that discharged during the days earlier than that to be istihaza. And if the number of days on which blood has been discharged according to her habit reaches ٨ sheshould observe precaution. And if along with the days of habit blood comes with signs of menses on some days following her habit and the total number of these days does notexceed ١٠ all of it is menses. In case, however, the number of days exceeds ١٠ if the days on which blood has been discharge according to habit is less than ٨, she should addto it some later days so that the number of days should accord with her habit and she should treat the blood discharged during those days to be menses and the rest to beistihaza. And in case the number of days on which blood has been discharged according to her habit is ٨ or more she should observe precaution